mix flour, baking soda, baking powder, brown sugar, white sugar
mix (blended) bananas, eggs, butter, cream cheese, vanilla extract, walnuts
transfer all together in a large mixing bowl
optional; use parchment paper for easier transfer from pan to cooling rack
I used 9x9" pan - any choice of baking pan works
sprinkle some powdered sugar, cut desired amount in pieces and ready to serve!